What's my Size? is a free Android app developed by Hugo Visser in the Utilities & Tools category. This app is a demo app made for the "Embracing Fragmentation" talk, which demonstrates how to use resources to create an app that runs on multiple devices.

The app provides users with their device's actual screen size in both pixels and device-independent pixels (dips). Additionally, it displays the view's size, screen type (small, normal, large, xlarge), and screen dpi class (ldpi, mdpi, hdpi, xhdpi, xxhdpi, xxxhdpi). What's my Size? is an open-source app, and its code is available on the website link provided.